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Clockwork graviton contributions to muon g - 2

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Title
Clockwork graviton contributions to muon g - 2
Author(s)
Deog Ki Hong; Du Hwan Kim; Chang Sub Shin
Publication Date
2018-02
Journal
Physical Review d, v.97, no.3, pp.035014
Publisher
AMER PHYSICAL SOC
Abstract
The clockwork mechanism for gravity introduces a tower of massive graviton modes, clockwork gravitons, with a very compressed mass spectrum, whose interaction strengths are much stronger than those of massless gravitons. In this work, we compute the lowest order contributions of the clockwork gravitons to the anomalous magnetic moment, g-2, of muon in the context of an extra dimensional model with a five-dimensional Planck mass, M5. We find that the total contributions are rather insensitive to the detailed model parameters and are determined mostly by the value of M5. To account for the current muon g-2 anomaly, M5 should be around 0.2 TeV, and the size of the extra dimension has to be quite large, l5 10-7 m. For M5 1 TeV, the clockwork graviton contributions are too small to explain the current muon g-2 anomaly. We also compare the clockwork graviton contributions with other extra dimensional models such as Randall-Sundrum models or large extra dimensional models. We find that the leading contributions in the small curvature limit are universal, but the cutoff-independent subleading contributions vary for different background geometries and the clockwork geometry gives the smallest subleading contributions. © 2018 authors
URI
https://pr.ibs.re.kr/handle/8788114/4735
DOI
10.1103/PhysRevD.97.035014
ISSN
2470-0010
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > 1. Journal Papers (저널논문)
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